| 摘要 |
PURPOSE:To enable the economical recording and readout of information by simple handling by applying an electric field to a ferroelectric vinylidene fluoride polymer to store information in a polarized state. CONSTITUTION:A photoconductive layer 2 is superposed on a storage element 1 made of a vinylidene fluoride polymer which is a high molecular ferroelectric substance, and they are held between transparent electrodes 4, 4' to form a laminate. By heating the laminate with light emitted from a flash lamp 6, the temp. of the element 1 is pulsatively raised to clear the whole surface, and voltage is applied between the electrodes 4, 4' of the laminate in an unpolarized state. When a light beam 3 is projected on the selected part S of the upper plane of the laminate, the selected part of the film 2 just under the part S is made electrically conductive, and an electric field is applied from a power source to the selected part S' of the element 1 between the electrode 4 and the selected part of the film 2. The selected part S' of the element 1 is set in a polarized state, so it holds information even after removing the light beam and the electric field. |
